wasteful and reckless with money
I was prodigal in my youth, and wasted the whole of my inheritance within two years.
pro (forth)#agere (drive) (Latin)
PRO with GAL: to become a pro (casanova) among gals you will have to waste money prod (rodies) +gals (girls)=extravagance. If you are with girls of rodies then you have to be extravagant.